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Home >> Infiniti >> 2021 >> Q50 Signature Edition, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Transfer Case (Service Information)) >> Disassembly And Assembly >> Rear Final Drive >> Rear Final Drive Pinion >> REAR FINAL DRIVE PINION : Disassembly & Assembly >> Assembly

REAR FINAL DRIVE PINION : Disassembly & Assembly: Assembly

WARNING: This page is about a different variant/trim than selected.
  1. Install front bearing outer race SYMBOL and rear bearing outer race SYMBOL using drifts (A, B and D) and drift bar (C).
    G04076393Courtesy of NISSAN NORTH AMERICA, INC.

    A

    : Drift [SST: ST30720000 (J-25405)]

    B

    : Drift [SST: KV40105230 (--)]

    C

    : Drift bar [SST: ST30611000 (J-25742-1)]

    D

    : Drift [SST: ST30613000 (J-25742-3)]
    CAUTION:
    • At first, using a hammer, tap bearing outer race until it becomes flat to gear carrier.
    • Never reuse pinion front and rear bearing outer race.
  2. Temporarily install pinion height adjusting washer SYMBOL .
    GNSJSDIA0760Z-760Courtesy of NISSAN NORTH AMERICA, INC.

    When hypoid gear set has been replaced 

    When hypoid gear set has been reused 

    • Temporarily install the removed pinion height adjusting washer or same thickness washer to drive pinion.
    CAUTION: Pay attention to the direction of pinion height adjusting washer. (Assemble as shown in the figure, below.)
  3. Install pinion rear bearing inner race SYMBOL to drive pinion with the drift (A) (commercial service tool).
    GNSJSDIA0761Z-761Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Never reuse pinion rear bearing inner race.
  4. Check and adjust the tooth contact and back lash of drive gear and drive pinion following the procedure below.
    1. Assemble drive pinion into gear carrier.
      CAUTION:
      • Never assemble collapsible spacer.
      • Apply gear oil to pinion rear bearing.
    2. Assemble pinion front bearing inner race to drive pinion assembly.
      CAUTION:
      • Never reuse pinion front bearing inner race.
      • Apply gear oil to pinion front bearing.
    3. Using press stand (A) [SST: ST38220000 (--)], press the pinion front bearing inner race to drive pinion as far as drive pinion lock nut can be tightened.
      GNSJSDIA6628Z-628Courtesy of NISSAN NORTH AMERICA, INC.
    4. Install companion flange.
      CAUTION: Never assemble front oil seal.
      NOTE: When reusing drive pinion, align the matching mark SYMBOL of drive pinion with the matching mark SYMBOL of companion flange, and then install companion flange SYMBOL .
      GNSJSDIA0016Z-016Courtesy of NISSAN NORTH AMERICA, INC.
    5. Temporarily tighten removed drive pinion lock nut to drive pinion.
      NOTE: Use removed drive pinion lock nut only for the preload measurement.
    6. Rotate drive pinion more than 20 times to adjust bearing.
    7. Tighten to drive pinion lock nut holding companion flange with the flange wrench (commercial service tool), while adjusting pinion bearing preload torque using preload gauge (A) [SST: ST3127S000 (J-25765-A)].
      GNSJSDIA0035Z-035Courtesy of NISSAN NORTH AMERICA, INC.

      (without oil seal)

      : 1.0 - 1.3 N.m (0.11 - 0.13 kg-m, 9 - 11 in-lb)
      CAUTION: Drive pinion lock nut is tightened with no collapsible spacer. Be careful not to overtighten it. While measuring the preload, tighten it by 5 deg. to 10 deg..
    8. Assemble removed side bearing adjusting washer or same thickness of it and install differential assembly. Refer to REAR FINAL DRIVE DIFFERENTIAL ASSEMBLY : Disassembly & Assembly .
      CAUTION: Apply differential gear oil to the side bearings.
    9. Check and adjust tooth contact, drive gear to drive pinion backlash. Refer to REAR FINAL DRIVE DIFFERENTIAL ASSEMBLY : Adjustment .
    10. Remove differential assembly.
    11. Remove companion flange.
    12. Remove drive pinion assembly from gear carrier.
    13. Remove pinion front bearing inner race.
  5. Assemble collapsible spacer.
    CAUTION: Never reuse collapsible spacer.
  6. Assemble drive pinion into gear carrier.
    CAUTION: Apply gear oil to pinion rear bearing.
  7. Assemble pinion front bearing inner race to drive pinion assembly.
    CAUTION:
    • Never reuse pinion front bearing inner race.
    • Apply gear oil to pinion front bearing.
  8. Using press stand (A) [SST: ST38220000 (--)], press the pinion front bearing inner race to drive pinion as far as drive pinion lock nut can be tightened.
    GNSJSDIA6628Z-628Courtesy of NISSAN NORTH AMERICA, INC.
  9. Install front oil seal until it becomes flush with the carrier end, using the drift (A) [SST: KV40104710 (--)] as shown in the figure, below.
    GNSJPDID0362Z-362Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Never reuse oil seal.
    • When installing, never incline oil seal.
    • Apply multi-purpose grease onto oil seal lips, and gear oil onto the circumference of oil seal.
  10. Install companion flange.
    NOTE: When reusing drive pinion, align the matching mark SYMBOL of drive pinion with the matching mark SYMBOL of companion flange, and then install companion flange SYMBOL .
    GNSJSDIA0016Z-016Courtesy of NISSAN NORTH AMERICA, INC.
  11. Apply anti-corrosion oil to the thread and seat of drive pinion lock nut, and temporarily tighten drive pinion lock nut to drive pinion.
    CAUTION: Never reuse drive pinion lock nut.
  12. While holding companion flange with the flange wrench (commercial service tool), tighten drive pinion lock nut within the limits of specified torque so as to keep the pinion bearing preload within a standard values, using preload gauge (A) [SST: ST3127S000 (J-25765-A)].
    GNSJSDIA0035Z-035Courtesy of NISSAN NORTH AMERICA, INC.

    Pinion bearing preload

    : Refer to REAR FINAL DRIVE : Service Data .
    CAUTION:
    • Adjust to the lower limit of the drive pinion lock nut tightening torque first.
    • If the preload torque exceeds the specified value, replace collapsible spacer and tighten it again to adjust. Never loosen drive pinion lock nut to adjust the preload torque.
    • After adjustment, rotate drive pinion back and forth 2 to 3 times to check for unusual noise, rotation malfunction, and other malfunctions.
  13. Install differential assembly. Refer to REAR FINAL DRIVE DIFFERENTIAL ASSEMBLY : Disassembly & Assembly .
    CAUTION: Never install rear cover at this timing.
  14. Check and adjust drive gear runout, tooth contact, and drive gear to drive pinion backlash. Refer to REAR FINAL DRIVE DIFFERENTIAL ASSEMBLY : Adjustment .
  15. Check total preload torque. Refer to REAR FINAL DRIVE DIFFERENTIAL ASSEMBLY : Adjustment .
  16. Install rear cover. Refer to REAR FINAL DRIVE DIFFERENTIAL ASSEMBLY : Disassembly & Assembly .
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